Re: [PATCH] btrfs: cleanup, stop casting for extent_map->lookup everywhere

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On Wed, Jun 03, 2015 at 10:55:48AM -0400, jeffm@xxxxxxxx wrote:
> From: Jeff Mahoney <jeffm@xxxxxxxx>
> 
> Overloading extent_map->bdev to struct map_lookup * might have started out
> as a means to an end, but it's a pattern that's used all over the place
> now. Let's get rid of the casting and just add a union instead.
> 
> Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxx>
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